Michiels, T., Cornelis, G., Ellis, K., & Grinsted, J. (1987). Tn2501, a Component of the Lactose Transposon Tn951, Is An Example of a New Category of Class-ii Transposable Elements. Journal of Bacteriology, 169(2), 624-631. https://hdl.handle.net/2078.5/49172 (Original work published 1987)